| 摘要 |
PURPOSE:To increase an amount of photodetection to a photoelectric converting element, by more decreasing the refractive index of a transmitting member of the original side arranged by clipping a photoelectric conversion element train, than that of a transmitting member of the light source side. CONSTITUTION:The 1st transmitting member 21 in close contact with an original 10, a photoelectric conversion element train 23, an opaque member 24, and the 2nd transmitting member 25 are arranged in this order to form a closely contact type image sensor. The refractive index of the member 25 is taken larger than that of the member 21. Thus, a light incident from the member 25 is refracted at the member 25 by theta2 and enters the member 21 from the opening of the member 24. The light is refracted by theta1 at the member 21 and reaches the original 10. The reflected light from the original 10 is refracted as 3 shown in Figure depending on the difference of the refractive indexes and is incident to the element 23. Thus, the utilizing rate of light is increased and the output of the photoelectric conversion element is increased. |
